OpenSSF Score Badge Update

[Salkimmich]

OpenSSF % Score Badge Added to Project

To obtain a 100% security score, there are several sections that maintainers will need to review and complete. The outputs below are sections the Keystone repository full security report.

1. Reporting Checks: Confirm Bug and Vulnerability Reporting Process. Both of these requirements can be met by writing a report process in your SECURITY.MD file.
2. Quality Checks: Confirm an Automated Test Suite
3. Security Checks: Confirm Cryptographic Best Practices
4. Analysis Checks: Confirm both Static and Dynamic Analysis Tooling